/*
 ** This file is in the public domain, so clarified as of
 ** June 5, 1996 by Arthur David Olson (arthur_david_olson@nih.gov).
 */

//static char	elsieid[] = "@(#)asctime.c	7.7";

#include "time_private.h"
#include "tzfile.h"

/*
 ** A la X3J11, with core dump avoidance.
 */

/*
char *asctime(const struct tm *timeptr)
{
    static char		result[3 * 2 + 5 * INT_STRLEN_MAXIMUM(int) +
                               3 + 2 + 1 + 1];
    return(asctime_r(timeptr, result));
}*/

char *
asctime_r(const struct tm *timeptr, char *result, int len)
{
    static const char	wday_name[][3] = {
        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
    };
    static const char	mon_name[][3] = {
        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
    };
    /*
     ** Big enough for something such as
     ** ??? ???-2147483648 -2147483648:-2147483648:-2147483648 -2147483648\n
     ** (two three-character abbreviations, five strings denoting integers,
     ** three explicit spaces, two explicit colons, a newline,
     ** and a trailing ASCII nul).
     */
    register const char *	wn;
    register const char *	mn;

    if (timeptr->tm_wday < 0 || timeptr->tm_wday >= DAYSPERWEEK)
        wn = "???";
    else	wn = wday_name[timeptr->tm_wday];
    if (timeptr->tm_mon < 0 || timeptr->tm_mon >= MONSPERYEAR)
        mn = "???";
    else	mn = mon_name[timeptr->tm_mon];
    /*
     ** The X3J11-suggested format is
     **	"%.3s %.3s%3d %02.2d:%02.2d:%02.2d %d\n"
     ** Since the .2 in 02.2d is ignored, we drop it.
     */
    (void) snprintf(result, len, "%.3s %.3s%3d %02d:%02d:%02d %d\n",
                   wn, mn,
                   timeptr->tm_mday, timeptr->tm_hour,
                   timeptr->tm_min, timeptr->tm_sec,
                   TM_YEAR_BASE + timeptr->tm_year);
    return result;
}
